A Historical Overview of the Therapeutic Use of Bacteriophages
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Phages and Human Health: More Than Idle Hitchhikers
viruses Review Phages and Human Health: More Than Idle Hitchhikers Dylan Lawrence 1,2 , Megan T. Baldridge 1,2,* and Scott A. Handley 2,3,* 1 Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA 2 Edison Family Center for Genome Sciences & Systems Biology, Washington University School of Medicine, St. Louis, MO 63110, USA 3 Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA * Correspondence: [email protected] (M.T.B.); [email protected] (S.A.H.) Received: 2 May 2019; Accepted: 25 June 2019; Published: 27 June 2019 Abstract: Bacteriophages, or phages, are viruses that infect bacteria and archaea. Phages have diverse morphologies and can be coded in DNA or RNA and as single or double strands with a large range of genome sizes. With the increasing use of metagenomic sequencing approaches to analyze complex samples, many studies generate massive amounts of “viral dark matter”, or sequences of viral origin unable to be classified either functionally or taxonomically. Metagenomic analysis of phages is still in its infancy, and uncovering novel phages continues to be a challenge. Work over the past two decades has begun to uncover key roles for phages in different environments, including the human gut. Recent studies in humans have identified expanded phage populations in both healthy infants and in inflammatory bowel disease patients, suggesting distinct phage activity during development and in specific disease states. In this review, we examine our current knowledge of phage biology and discuss recent efforts to improve the analysis and discovery of novel phages. -
A Review of Topical Phage Therapy for Chronically Infected Wounds
antibiotics Review A Review of Topical Phage Therapy for Chronically Infected Wounds and Preparations for a Randomized Adaptive Clinical Trial Evaluating Topical Phage Therapy in Chronically Infected Diabetic Foot Ulcers Christopher Anthony Duplessis * and Biswajit Biswas Naval Medical Research Center, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA; [email protected] * Correspondence: [email protected]; Tel.: +1-240-778-7268 Received: 8 May 2020; Accepted: 24 June 2020; Published: 4 July 2020 Abstract: The advent and increasing prevalence of antimicrobial resistance commensurate with the absence of novel antibiotics on the horizon raises the specter of untreatable infections. Phages have been safely administered to thousands of patients exhibiting signals of efficacy in many experiencing infections refractory to antecedent antibiotics. Topical phage therapy may represent a convenient and efficacious treatment modality for chronic refractory infected cutaneous wounds spanning all classifications including venous stasis, burn-mediated, and diabetic ulcers. We will initially provide results from a systematic literature review of topical phage therapy used clinically in refractorily infected chronic wounds. We will then segue into a synopsis of the preparations for a forthcoming phase II a randomized placebo-controlled clinical trial assessing the therapeutic efficacy exploiting adjunctive personalized phage administration, delivered topically, intravenously (IV) and via a combination of both modalities (IV -
Alexander Sulakvelidze. 3. Address: Intralytix, Inc., 701 East Pratt St, Balti
1. Date: October 27, 2010 2. Name of submitter: Alexander Sulakvelidze. 3. Address: Intralytix, Inc., 701 East Pratt St, Baltimore, Maryland 21202 4. Description of the proposed action: The food contact substance is a product called EcoShield™, which is composed of three different strains of bacteriophages that have the ability to specifically and selectively kill the harmful E. coli strain O157:H7, which can cause a serious foodborne illness. The proposed use of the food additive is to act as an antimicrobial processing aid by reducing the level of surface contamination of red meat with E. coli O157:H7 prior to the meat grinding process. The product is (i) All natural (all component phages were isolated from the environment) and not genetically modified, (ii) Does not contain preservatives, (iii) Does not alter food flavor, aroma, or appearance, (iv) Does not contain any known, potentially allergenic substances, (v) Is certified both Kosher and Halal (with OMRI certification pending), and (vi) Is cost effective and cost competitive. EcoShield™ is sold as a concentrate that is diluted (with water) 1:10; the use level concentration is applied to the parts and trim of the red meat at a rate of approximately 1 mL per 250 cm2 of surface area. Need for proposal Foodborne illnesses are a substantial health burden in the United States. The Center for Disease Control estimates that each year, 76 million people get sick, 300,000 are hospitalized, and 5,000 die. In the U.S. alone, these illnesses are estimated to cause $37.1 billion annually in medical costs and lost productivity. -
UC Davis Norma J
UC Davis Norma J. Lang Prize for Undergraduate Information Research Title The Secret Life of Bacteriophages: How Did They Originate? Permalink https://escholarship.org/uc/item/0mv3j0wg Author Hand, Katherine Publication Date 2021-05-28 eScholarship.org Powered by the California Digital Library University of California Hand 1 Katherine Hand March 12, 2021 Dr. Bradley Sekedat UWP 101 The Secret Life of Bacteriophages: How Did They Originate? One of life’s greatest mysteries, the origin of viruses, remains unsolved. To crack the case, scientists proposed three major hypotheses. How the origins of viruses continue to remain undiscovered despite the hypotheses put forward calls for further investigation into the topic. Discovered in the early twentieth century by Frederick Twort and Felix d’Herelle ( Drulis-Kawa et al., 2015 ), bacteriophages are considered the most successful entities (Moelling, 2012) and they help build the genomes of all species. What began as a narrow belief that viruses only prefer to genetically exchange with hosts of their superkingdom (Archaea, Bacteria, or Eukarya), studies on bacteriophages prove this untrue. The secret life of bacteriophages is seemingly more peculiar in the human gut as they coevolve with bacteria and interact with our immune system. Their distinctive interactions with white blood cells (WBC) and their hosts demonstrate a connection with their protein fold and structural make-up. This leaves us with an interesting question: where did the phages originate from? Assessing how bacteriophages can be antimorphic mutations 1 of early bacterial defense mechanisms where an accumulation of proteins that should not have bound together, bound together over time and self-infected a bacterial cell from within might be our answer. -
Agency Response Letter GRAS Notice No. GRN 000672
. U.S. FOOD & DRUG ADMINISTRATION CENTER FOR FOOD SAFETY &APPLIED NUTRITION . Alexander Sulakvelidze, Ph.D. Intralytix, Inc. 701 E. Pratt Street Baltimore, MD 21202 Re: GRAS Notice No. GRN 000672 Dear Dr. Sulakvelidze: The Food and Drug Administration (FDA, we) completed our evaluation of GRN 000672. We received the notice, dated October 4, 2016, that you submitted under the format of the agency’s final rule (81 FR 54960; August 17, 2016; Substances Generally Recognized as Safe (GRAS)) on October 5, 2016, and filed it on October 13, 2016. We received amendments containing additional safety information on November 23, 2016, February 24, 2017, and March 07, 2017. The subject of the notice is a preparation containing five bacterial monophages specific to Shigella spp. (Shigella phage preparation) for use as an antimicrobial agent on ready-to-eat- meat and poultry, fish (including smoked fish), shellfish, fresh and processed fruits and vegetables, and dairy products including cheese at levels up to 1 x 108 plaque forming units (PFU)/g food. The notice informs us of the view of Intralytix, Inc. (Intralytix) that this use of Shigella phage preparation is GRAS through scientific procedures. Our use of the term, “Shigella phage preparation,” in this letter is not our recommendation of that term as an appropriate common or usual name for declaring the substance in accordance with FDA’s labeling requirements. Under 21 CFR 101.4, each ingredient must be declared by its common or usual name. In addition, 21 CFR 102.5 outlines general principles to use when establishing common or usual names for nonstandardized foods. -
Phage Therapy in Veterinary Medicine
antibiotics Review Phage Therapy in Veterinary Medicine Rosa Loponte, Ugo Pagnini, Giuseppe Iovane and Giuseppe Pisanelli * Department of Veterinary Medicine and Animal Production, University of Naples Federico II, via Federico Delpino, 1, 80137 Naples, Italy; [email protected] (R.L.); [email protected] (U.P.); [email protected] (G.I.) * Correspondence: [email protected]; Tel.: +39-081-2536363 Abstract: To overcome the obstacle of antimicrobial resistance, researchers are investigating the use of phage therapy as an alternative and/or supplementation to antibiotics to treat and prevent infections both in humans and in animals. In the first part of this review, we describe the unique biological characteristics of bacteriophages and the crucial aspects influencing the success of phage therapy. However, despite their efficacy and safety, there is still no specific legislation that regulates their use. In the second part of this review, we describe the comprehensive research done in the past and recent years to address the use of phage therapy for the treatment and prevention of bacterial disease affecting domestic animals as an alternative to antibiotic treatments. While in farm animals, phage therapy efficacy perspectives have been widely studied in vitro and in vivo, especially for zoonoses and diseases linked to economic losses (such as mastitis), in pets, studies are still few and rather recent. Keywords: alternative to antibiotics; bacteriophages; phage therapy; veterinary medicine; pets Citation: Loponte, R.; Pagnini, U.; 1. Introduction and History Notes Iovane, G.; Pisanelli, G. Phage Therapy in Veterinary Medicine. Bacteriophages are viruses that parasitize bacteria. This attribute can be used to treat Antibiotics 2021, 10, 421. -
Phage Therapy's Latest Makeover
DispatchDate: 17.04.2019 · ProofNo: 133, p.1 news feature 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Credit: Dr. Robert Pope, National Biodefense Analysis & Countermeasures Center 30 31 32 33 Phage therapy’s latest makeover 34 35 As issues of product consistency, standardization and specificity are being tackled, can phage therapeutics—long 36 oversold and overhyped—finally realize their antibacterial potential? Charles Schmidt investigates. 37 38 Charles Schmidt 39 40 41 n May of 2018, an international team of million grant from the UCSD chancellor, Still, previous experience, mostly in 42 researchers and clinicians reported they the new Center for Innovative Phage the context of compassionate-use phage 43 successfully treated a seriously ill teenager Applications and Therapeutics (IPATH) treatments, has shown the approach to 44 I with cystic fibrosis who had disseminated is applying “the same principles of clinical be hit-and-miss, time-consuming and 45 infection by Mycobacterium abscessus with evaluation and development to phage expensive. To turn bacteriophage from 46 a cocktail of genetically engineered phage1. therapy that would be applied to any other a laboratory tool into an efficacious 47 According to the University of Pittsburgh’s therapeutic entity,” says center co-director therapeutic for broader markets, companies 48 Graham Hatfull, who led the research team, Robert Schooley, a physician and infectious are seeking to scale up production and 49 this accomplishment represents a number disease specialist at UCSD. deliver potent phage products under good 50 of firsts: the first genetically engineered A worsening crisis of multi-drug- manufacturing practices (GMP) quickly 51 phage treatment—in this case, to convert resistant (MDR) infections, along with and reliably. -
Bacteriophages As Potential Tools for Use in Antimicrobial Therapy and Vaccine Development
pharmaceuticals Review Bacteriophages as Potential Tools for Use in Antimicrobial Therapy and Vaccine Development Beata Zalewska-Pi ˛atek 1,* and Rafał Pi ˛atek 1,2 1 Department of Molecular Biotechnology and Microbiology, Chemical Faculty, Gda´nskUniversity of Technology, Narutowicza 11/12, 80-233 Gda´nsk,Poland; [email protected] 2 BioTechMed Center, Gda´nskUniversity of Technology, Narutowicza 11/12, 80-233 Gda´nsk,Poland * Correspondence: [email protected]; Tel.: +58-347-1862; Fax: +58-347-1822 Abstract: The constantly growing number of people suffering from bacterial, viral, or fungal infec- tions, parasitic diseases, and cancers prompts the search for innovative methods of disease prevention and treatment, especially based on vaccines and targeted therapy. An additional problem is the global threat to humanity resulting from the increasing resistance of bacteria to commonly used antibiotics. Conventional vaccines based on bacteria or viruses are common and are generally effective in pre- venting and controlling various infectious diseases in humans. However, there are problems with the stability of these vaccines, their transport, targeted delivery, safe use, and side effects. In this context, experimental phage therapy based on viruses replicating in bacterial cells currently offers a chance for a breakthrough in the treatment of bacterial infections. Phages are not infectious and pathogenic to eukaryotic cells and do not cause diseases in human body. Furthermore, bacterial viruses are sufficient immuno-stimulators with potential adjuvant abilities, easy to transport, and store. They can also be produced on a large scale with cost reduction. In recent years, they have also provided an ideal platform for the design and production of phage-based vaccines to induce protective host immune responses. -
Mar 01, 2014 Discover Magazine March, 2014 Infections
7447001372 3 Infections Infected In the face of antibiotic resistance, phage therapy may be coming to a pharmacy near you. BY LINDA MARSA ~ It was a guerrilla assault worthy -,of the takedown of Osama bin Laden. But in this case, the assassins A phage is a type of virus that attacks and infiltrates bacteria. In this digital rendering, were intrepid viral invaders. In Andrew T-bacteriophages are on the attack, injecting their genetic material into the bacteria. Camilli's molecular biology lab at Tufts University in Boston, researchers found Alexander Sulakvelidze, a phage expert tions worked, and sometimes they didn't. the telltale footprints of a startling at the Emerging Pathogens Institute at Also, people occasionally became sick attack against cholera, a deadly bacterial the University of Florida in Gainesville. after ingesting the tiny microbes because disease. They were analyzing the DNA Without a way to manage infections, the treatments weren't purified properly. sequences of tiny viruses called bacte surgeries ranging from simple procedures Western physicians discarded them once riophages (literally, "bacteria eaters") to complex organ transplants would the more reliable antibiotics became lurking in the stool samples of cholera become risky, he explains: "You have a widely available after World War II. patients. The phages' DNA contained very real and alarming possibility that However, Soviet scientists figured some of the genes from another patients will either die or will develop out how to make phages more effec bacteria's inunune system. Somehow, the complications. " Many researchers believe tive - advances in molecular biology tiny phages sneaked in and overpowered it's time to look beyond antibiotics. -
Phage Biocontrol Applications in Food Production and Processing
Curr. Issues Mol. Biol. (2021) 40: 267-302. caister.com/cimb Phage Biocontrol Applications in Food Production and Processing Amit Vikram*, Joelle Woolston and Alexander Sulakvelidze Intralytix, Inc., Columbia, Maryland 21046, U.S.A. *Corresponding author: [email protected] DOI: https://doi.org/10.21775/cimb.040.267 Abstract Bacteriophages, or phages, are one of the most – if not the most – ubiquitous organisms on Earth. Interest in various practical applications of bacteriophages has been gaining momentum recently, with perhaps the most attention (and most regulatory approvals) focused on their use to improve food safety. This approach, termed “phage biocontrol” or “bacteriophage biocontrol,” includes both pre- and post-harvest application of phages as well as decontamination of the food contact surfaces in food processing facilities. This review focuses on post-harvest applications of phage biocontrol, currently the most commonly used type of phage mediation. We also briefly describe various commercially available phage preparations and discuss the challenges still facing this novel yet promising approach. Phages are Ancient and Abundant in Nature Bacteriophages are the viruses that infect bacteria. They were discovered in 1917 by Félix d’Hérelle in 1917 (Salmond and Fineran, 2015; Sulakvelidze et al., 2001), who also coined the term “bacteriophage,” derived from "bacteria" and the Greek φαγεῖν (phagein) meaning “to eat” or "to devour" bacteria. Numerous studies, including recent metagenomic surveys, suggest that phages are (i) arguably the oldest microorganisms on this planet that likely originated approximately 3 billion years ago (Brüssow, 2007), and (ii) likely the most ubiquitous organisms on Earth, abundant in all life-supporting environments including all natural untreated foods. -
BACTERIOPHAGES: a New Old Biomedical Technology
POLICY BRIEF 10 August 2010 BACTERIOPHAGES: A New Old Biomedical Technology Antibiotic resistance is a challenge that calls for good Limited 2009). Bacterial counts and symptoms were science as well as ingenuity. Although we will always reduced. Encouraged, the company is moving on to a need new antibiotics, there are alternative therapeutic larger trial. In the United States, Intralytix successfully approaches worth considering. One example is concluded a preliminary safety trial of bacteriophage bacteriophage therapy. Bacteriophages—or ―phages‖— therapy of venous leg ulcers (Wolcott et al. 2009). Other exist in abundance in nature, including in and on the clinical trials (P. aeruginosa and S. aureus in burns and human body. Phages are viruses that infect bacteria genetically engineered bacteriophages) are under way and use the bacterial cell’s genetic apparatus to in the United Kingdom. produce more phages. In the process, they kill their host. By harnessing phages’ natural ability to destroy Bacteriophages have shown promise as tools for bacteria, infections can be cleared. infection control as well. Scientists from the University of Strathclyde have chemically bonded phages to nylon After Felix d’Herelle’s discovery and isolation of the first products such as strips, sutures and implantable beads bacteriophage in 1917, the long-sought cure for (The Medical News 2005), which they use during bacterial infections seemed to be at hand. But with the surgery. This preparation is effective against most dawn of the antibiotic era in 1941, when penicillin was major epidemic methicillin-resistant Staphylococcus discovered, the western medical establishment lost aureus (MRSA) strains. Bacteriophages on sutures can interest in phages. -
A Review of Phage Therapy Against Bacterial Pathogens of Aquatic and Terrestrial Organisms
viruses Review A Review of Phage Therapy against Bacterial Pathogens of Aquatic and Terrestrial Organisms Janis Doss, Kayla Culbertson, Delilah Hahn, Joanna Camacho and Nazir Barekzi * Old Dominion University, Department of Biological Sciences, 5115 Hampton Blvd, Norfolk, VA 23529, USA; [email protected] (J.D.); [email protected] (K.C.); [email protected] (D.H.); [email protected] (J.C.) * Correspondence: [email protected] Academic Editor: Jens H. Kuhn Received: 27 January 2017; Accepted: 13 March 2017; Published: 18 March 2017 Abstract: Since the discovery of bacteriophage in the early 1900s, there have been numerous attempts to exploit their innate ability to kill bacteria. The purpose of this report is to review current findings and new developments in phage therapy with an emphasis on bacterial diseases of marine organisms, humans, and plants. The body of evidence includes data from studies investigating bacteriophage in marine and land environments as modern antimicrobial agents against harmful bacteria. The goal of this paper is to present an overview of the topic of phage therapy, the use of phage-derived protein therapy, and the hosts that bacteriophage are currently being used against, with an emphasis on the uses of bacteriophage against marine, human, animal and plant pathogens. Keywords: bacteriophage; Vibrio phage; phage therapy; aquaculture 1. Introduction Bacteriophage are commonly referred to as phage and are defined as viruses that infect bacteria. Phage are ubiquitous and require a bacterial host. They are also the most abundant organisms found in the biosphere. Bacteriophage-bacterial host interactions have been exploited by scientists as tools to understand basic molecular biology, genetic recombination events, horizontal gene transfer, and how bacterial evolution has been driven by phage [1].